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Transmit/receive switch device

  • US 7,468,638 B1
  • Filed: 06/19/2007
  • Issued: 12/23/2008
  • Est. Priority Date: 06/20/2006
  • Status: Expired due to Fees
First Claim
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1. An integrated transmit/receive switch device, comprising:

  • a substrate;

    an antenna port to couple with an antenna;

    a transmitter port to couple with a transmitter;

    a receiver port to couple with a receiver;

    a receive path between the antenna port and the receiver port;

    a transmit path between the antenna port and the transmitter port, the transmit path including a first transistor on the substrate, the first transistor coupled in series between the antenna port and the transmitter port, wherein a body node of the first transistor is unconnected, and wherein the substrate is configured to provide a high impedance path from the first transistor to a reference voltage;

    a second transistor on the substrate, the second transistor coupled in series between the receiver port and the reference voltage.

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